Update 10-dynamic-pages.md
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@ -65,11 +65,8 @@ class FilePageReader implements PageReader
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{
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private $pageFolder;
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public function __construct($pageFolder)
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public function __construct(string $pageFolder)
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{
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if (!is_string($pageFolder)) {
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throw new InvalidArgumentException('pageFolder must be a string');
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}
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$this->pageFolder = $pageFolder;
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}
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@ -84,8 +81,6 @@ As you can see we are requiring the page folder path as a constructor argument.
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You could also put the page related things into it's own package and reuse it in different applications. Because we are not tightly coupling things, things are very flexible.
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Because PHP does not have the ability to type hint for scalar values (things like strings and integers), we have to manually check that `$pageFolder` is a string. If we don't do that, there might be a bug in the future that is hard to find if a wrong type is injected. By throwing an exception, this can be caught and debugged immediately.
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This will do for now. Let's create a template file for our pages with the name `Page.html` in the `templates` folder. For now just add `{{ content }}` in there.
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Add the following to your `Dependencies.php` file so that the application know which implementation to inject for our new interface. We also define the the `pageFolder` there.
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